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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK; Malden, USA : Blackwell Science Ltd
    Journal of fish biology 67 (2005), S. 0 
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Wild Alaskan sockeye salmon Oncorhynchus nerka jumping natural waterfalls were observed and photographed to obtain insight into factors important to the fish in dealing with obstacles during their upstream spawning migrations. The fish showed preferences for specific sets of conditions related to heights of waterfalls and depths in pools below waterfalls. Successful jumps appeared to result from running starts, not standing fast starts. The proportion of observed jumps that were successful was low (10% at Brooks Falls, Katmai National Park, Alaska, U.S.A.). Successful jumping behaviour was modelled mathematically and predictions were compared to measured kinematic variables of successful and unsuccessful jumping obtained from analyses of digital video photographs. There were statistically significant differences between the two data sets, but the model identified takeoff velocities and angles, and distances between takeoffs and successful landings as important variables.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1963
    Keywords: Schlüsselwörter Chlorom ; Epidural ; Granulozytäres Sarkom ; Myeloische Leukämie ; Spinal ; Key words Chloroma ; Granulocytic sarcoma ; Leukemia ; Myeloid ; Spinal neoplasms diagnosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Granulocytic sarcomas (so-called chloromas) are rare extramedullary tumorlike proliferates of myelogenous precursor cells that may de novo precede acute leukemia or coincide with the first manifestation or relapse of acute myeloid leukemia. Rarely, such tumors represent the initial manifestation of a blast crisis in the course of a chronic myeloproliferative disease, such as chronic myeloid leukemia. If they occur in aleukemic patients incorrect diagnoses may result. Differential diagnostic considerations are being discussed by presenting the case of a 58-year-old man who experienced spinal cord compression by an isolated epidural mass lesion.
    Notes: Zusammenfassung Granulozytäre Sarkome (sog. Chlorome) sind seltene extramedulläre Tumore bzw. tumorartige Proliferate myeloischer Vorläuferzellen, die de novo einer akuten Leukämie vorausgehen oder auch in zeitlichem Zusammenhang mit der Erstmanifestation oder dem Rezidiv einer AML auftreten können. Selten sind diese Tumore Ausdruck eines Blastenschubs einer chronischen myeloproliferativen Erkrankung, z.B. einer chronischen myeloischen Leukämie. Differentialdiagnostische Schwierigkeiten können insbesondere dann entstehen, wenn sich das Chlorom, wie im vorgestellten Fall eines 58jährigen Mannes, primär im spinalen epiduralen Raum mit Kompression des Rückenmarks manifestiert.
    Type of Medium: Electronic Resource
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